<nav class="navbar navbar-default navbar-fixed-top">
  <div class="container-fluid">
    <div class="navbar-header">
      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1" aria-expanded="false">
        <span class="sr-only">Toggle navigation</span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
      </button>
      <a class="navbar-brand" href="https://blog.csdn.net/m0_50281408?spm=1000.2115.3001.5343">科</a>
    </div>

    <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
      <ul class="nav navbar-nav">
        <li ><a href="#">创建历程 </a></li>
        <li><a href="#">技术总结</a></li>
      </ul>
      <ul class="nav navbar-nav navbar-right">
        <li class="dropdown">
            <li><a href="#">管理员身份申请</a></li>
          <li><a href="{{ url_for("admin.admin_login") }}">管理员登录</a></li>
        </li>
      </ul>
    </div>
  </div>
</nav>